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As a core technology in the field of high and new tech manufacturing,3D printing occupies an important position in the production process of aviation, shipbuilding, and automobiles. With the rapid development of 3D printing basic theory in recent years, how to further improve product accuracy, quality and modeling efficiency has become the current research focus in this field. Firstly, we conducted further research on the key technologies of FDM 3D printer, and combining 3D reconstruction technology with pretreatment technology. Secondly, we constructed and optimized the corresponding model layered slice and filling path planning algorithm. Thirdly, we designed a 3D suitable for rapid prototyping products printing control system. The research can provide an effective experience for the application of 3D printing technologies.

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Since there is no infrastructure in wireless sensor networks, the CDS (Connected Dominating Set) has been widely used as a virtual backbone. It is desirable that the virtual backbone is fault tolerate because node and link failure are inherent in wireless sensor networks. In this paper, we propose an algorithm which constructs a MESH-CDS in a localized manner in order to resist the failure of one node on the backbone. The size of the MESH-CDS is within a constant factor of optimal CDS for the sake of saving energy.Simulation results show that it can improve the energy efficiency of networks.